the worst farts are the ones in the shower, especially when your shampooing your hair and the stench mixes with the orange scented shampoo to create a smell from a nearby apocolyptic future aka really bad.

But this raises an interesting question, how do you decide if its a good fart?
Are good farts ones that don't stink and have little sound thus having the lowest negative impact or are the farts with the most pungent and hellish scents and sounds the best because they are limited and have lots of hype around them. Think about it...